<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>用户管理</el-breadcrumb-item>
			<el-breadcrumb-item>用户列表</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片视图区域 -->
		<el-card>
			<!-- 搜索与添加区域 -->
			<el-row :gutter="20">
				<el-col :span="8">
					<el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
						<el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
					</el-input>
				</el-col>
				<el-col :span="4">
					<el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
				</el-col>
			</el-row>

			<!-- 用户列表区域 -->
			<el-table :data="userlist" border stripe>
				<el-table-column type="index"></el-table-column>
				<el-table-column label="姓名" prop="username"></el-table-column>
				<el-table-column label="邮箱" prop="email"></el-table-column>
				<el-table-column label="电话" prop="mobile"></el-table-column>
				<el-table-column label="角色" prop="role_name"></el-table-column>
				<el-table-column label="状态">
					<template slot-scope="scope">
						<el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
					</template>
				</el-table-column>
				<el-table-column label="操作" width="180px">
					<template slot-scope="scope">
						<!-- 修改按钮 -->
						<el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
						<!-- 删除按钮 -->
						<el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
						<!-- 分配角色按钮 -->
						<el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
							<el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
						</el-tooltip>
					</template>
				</el-table-column>
			</el-table>

			<!-- 分页区域 -->
			<el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[1, 2, 5, 10]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total">
    	</el-pagination>
		</el-card>

		<!-- 添加用户的对话框 -->
		<el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
			<!-- 内容主体区域 -->
			<el-form ref="addFormRef" :model="addForm" :rules="addFormRules" label-width="70px">
				<el-form-item label="用户名" prop="username">
					<el-input v-model="addForm.username"></el-input>
				</el-form-item>
				<el-form-item label="密码" prop="password">
					<el-input v-model="addForm.password"></el-input>
				</el-form-item>
				<el-form-item label="邮箱" prop="email">
					<el-input v-model="addForm.email"></el-input>
				</el-form-item>
				<el-form-item label="手机" prop="mobile">
					<el-input v-model="addForm.mobile"></el-input>
				</el-form-item>
			</el-form>
			<!-- 底部区域 -->
			<span slot="footer" class="dialog-footer">
				<el-button @click="addDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addUser">确 定</el-button>
			</span>
		</el-dialog>

		<!-- 修改用户的对话框 -->
		<el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
		<el-form ref="editFormRef" :model="editForm" :rules="editFormRules" label-width="70px">
			<el-form-item label="用户名">
				<el-input v-model="editForm.username" disabled></el-input>
			</el-form-item>
			<el-form-item label="邮箱" prop="email">
				<el-input v-model="editForm.email"></el-input>
			</el-form-item>
			<el-form-item label="手机" prop="mobile">
				<el-input v-model="editForm.mobile"></el-input>
			</el-form-item>
		</el-form>
		<span slot="footer" class="dialog-footer">
			<el-button @click="editDialogVisible = false">取 消</el-button>
			<el-button type="primary" @click="deitUserInfo">确 定</el-button>
		</span>
		</el-dialog>

		<!-- 分配角色的对话框 -->
		<el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%" @close="setRoleDialogClosed">
			<div>
				<p>当前的用户：{{userInfo.username}}</p>
				<p>当前的角色：{{userInfo.role_name}}</p>
				<p>分配新角色：
					<el-select v-model="selectedRoleId" placeholder="请选择">
						<el-option
						v-for="item in rolesList"
						:key="item.id"
						:label="item.roleName"
						:value="item.id">
						</el-option>
					</el-select>
				</p>
			</div>
			<span slot="footer" class="dialog-footer">
				<el-button @click="setRoleDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="saveRoleInfo">确 定</el-button>
			</span>
		</el-dialog>
	</div>
</template>

<script>
export default {
	data() {
		// 验证邮箱的规则
		var checkEmail = (rule, value, cb) => {
			// 验证邮箱的正则表达式
			const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/

			if(regEmail.test(value)) {
				return cb()
			}

			cb(new Error('请输入合法的邮箱'))
		}

		// 验证手机号的规则
		var checkMobile = (rule, value, cb) => {
			// 验证手机号的正则表达式
			const regMobile = /^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/

			if(regMobile.test(value)) {
				return cb()
			}

			cb(new Error('请输入合法的手机号'))
		}

		return {
			// 获取用户列表的参数对象
			queryInfo: {
				query: '',
				// 当前的页数
				pagenum: 1,
				// 当前每页显示多少条数据
				pagesize: 2
			},
			userlist: [],
			total: 0,
			// 控制添加用户对话框的显示与隐藏
			addDialogVisible: false,
			// 添加用户的表单数据
			addForm: {
				username: '',
				password: '',
				email: '',
				mobile: ''
			},
			// 添加表单的验证规则对象
			addFormRules: {
				username: [
					{ required: true, message: '请输入用户名', trigger: 'blur' },
					{ min: 3, max: 10, message: '用户名的长度在3~10个字符之间', trigger: 'blur' }
				],
				password: [
					{ required: true, message: '请输入密码', trigger: 'blur' },
					{ min: 6, max: 15, message: '密码的长度在6~15个字符之间', trigger: 'blur' }
				],
				email: [
					{ required: true, message: '请输入邮箱', trigger: 'blur' },
					{validator: checkEmail, trigger: 'blur'}
				],
				mobile: [
					{ required: true, message: '请输入手机号', trigger: 'blur' },
					{validator: checkMobile, trigger: 'blur'}
				]
			},
			// 控制修改用户对话框的显示与隐藏
			editDialogVisible: false,
			// 查询到的用户信息对象
			editForm: {},
			// 修改表单的验证规则对象
			editFormRules: {
				email: [
					{ required: true, message: '请输入用户邮箱', trigger: 'blur' },
					{ validator: checkEmail, trigger: 'blur' }
				],
				mobile: [
					{ required: true, message: '请输入用户手机', trigger: 'blur' },
					{ validator: checkMobile, trigger: 'blur' }
				]
			},
			// 控制分配角色对话框的显示与隐藏
			setRoleDialogVisible: false,
			// 需要被分配角色的用户信息
			userInfo: {},
			// 所有角色的数据列表
			rolesList: [],
			// 已选中的角色id值
			selectedRoleId: ''
		}
	},
	created() {
		this.getUserList()
	},
	methods: {
		async getUserList() {
			const { data: res } = await this.$http.get('users', {
				params: this.queryInfo 
			})
			if (res.meta.status !== 200) return this.$message.error('获取用户列表失败！')
			this.userlist = res.data.users
			this.total = res.data.total
			// console.log(res)
		},
		// 监听 pagesize 改变的事件
		handleSizeChange(newSize) {
			// console.log(newSize)
			this.queryInfo.pagesize = newSize
			this.getUserList()
		},
		// 监听页码值改变的事件
		handleCurrentChange(newPage) {
			// console.log(newPage)
			this.queryInfo.pagenum = newPage
			this.getUserList()
		},
		// 监听 switch 开关状态的改变
		async userStateChanged(userinfo) {
			// console.log(userinfo)
			const {data: res} = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
			if (res.meta.status !== 200) {
				userinfo.mg_state = !userinfo.mg_state
				return this.$message.error('更新用户状态失败！')
			}else {
				this.$message.success('更新用户状态成功！')
			}
		},
		// 监听添加用户对话框的关闭事件
		addDialogClosed() {
			this.$refs.addFormRef.resetFields()
		},
		// 点击按钮，添加新用户
		addUser() {
			this.$refs.addFormRef.validate(async valid => {
				if (!valid) return
				// 可以发起添加用户的网络请求
				const {data: res} = await this.$http.post('users', this.addForm)

				if(res.meta.status !== 201) {
					this.$message.error('添加用户失败！')
				}

				this.$message.success('添加用户成功！')
				// 隐藏添加用户的对话框
				this.addDialogVisible = false
				// 重新获取用户列表数据
				this.getUserList()
			})
		},
		// 展示编辑用户的对话框
		async showEditDialog(id) {
			// console.log(id)
			const {data: res} = await this.$http.get('users/' + id)

			if(res.meta.status !== 200) {
				return this.$message.error('查询用户信息失败！')
			}

			this.editForm = res.data
			this.editDialogVisible = true
		},
		// 监听修改用户对话框的关闭事件
		editDialogClosed() {
			this.$refs.editFormRef.resetFields()
		},
		// 修改用户信息并提交
		deitUserInfo() {
			this.$refs.editFormRef.validate(async valid => {
				if(!valid) return
				// 发起修改用户信息的数据请求
				const {data: res} = await this.$http.put('users/' + this.editForm.id, {
					email: this.editForm.email, mobile: this.editForm.mobile
				})

				if(res.meta.status !== 200) {
					return this.$message.error('更新用户信息失败！')
				}

				// 关闭对话框
				this.editDialogVisible = false
				// 刷新数据列表
				this.getUserList()
				// 提示修改成功
				this.$message.success('更新用户信息成功！')
			})
		},
		// 根据id删除对应的用户信息
		async removeUserById(id) {
			// 弹框询问用户是否删除数据
			const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
				confirmButtonText: '确定',
				cancelButtonText: '取消',
				type: 'warning'
			}).catch(err => err)

			// 如果用户确认删除，则返回值为字符串 confirm
			// 如果用户取消删除，则返回值为字符串 canael
			// console.log(confirmResult)
			if(confirmResult !== 'confirm') {
				return this.$message.info('已取消删除')
			}

			const {data: res} = await this.$http.delete('users/' + id)

			if(res.meta.status !==200) {
				return this.$message.error('删除用户失败！')
			}

			this.$message.success('删除用户成功！')
			this.getUserList()
		},
		// 展示分配角色的对话框
		async setRole(userInfo) {
			this.userInfo = userInfo

			// 在展示对话框之前，获取所有角色的列表
			const {data: res} = await this.$http.get('roles')
			if(res.meta.status !== 200) {
				return this.$message.error('获取角色列表失败！')
			}

			this.rolesList = res.data

			this.setRoleDialogVisible = true
		},
		// 点击按钮，分配角色
		async saveRoleInfo() {
			if(!this.selectedRoleId) {
				return this.$message.erroe('请选择要分配的角色！')
			}

			const {data: res} = await this.$http.put(`users/${this.userInfo.id}/role`, {
				rid: this.selectedRoleId
			})

			if(res.meta.status !== 200) {
				return this.$message.error('更新角色失败！')
			}

			this.$message.success('更新角色成功！')
			this.getUserList()
			this.setRoleDialogVisible = false
		},
		// 监听分配角色对话框的关闭事件
		setRoleDialogClosed() {
			this.selectedRoleId = ''
			this.userInfo = {}
		}
    }
}
</script>

<style lang="less" scoped>

</style>
